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Sustainability: What Does it Mean for Engineers?. Objectives. By the end of this unit, students should be able to: Define sustainability. List the 3 pillars of sustainability. Give an example of ways that engineers can contribute to a sustainable future.
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Objectives By the end of this unit, students should be able to: • Define sustainability. • List the 3 pillars of sustainability. • Give an example of ways that engineers can contribute to a sustainable future. • Give an example of a sustainability indicator/metric for engineering designs.
What is Sustainability? • Meeting society’s present needs without compromising the ability of future generations to meet their own needs. (Brundtland Commission, 1987) • Humans are integral part of the natural world and nature must be preserved.
Triple Bottom Line Solutions Good for the environment Good for economics Good for society
The 3 Pillars • People • Fair practices for all people and does not exploit interest of separate parties based on money, status or growth. • Planet • Management of renewable and non renewable resources while reducing waste. • Profit • Financial benefit enjoyed by the majority of society.
Examples of Other Ways that Engineers Can Contribute to a Sustainable Future
But not if we keep designing things in the same old way. Engineers of the future need to think differently.
Traditional Engineering Design Criteria: • Function • Cost • Safety Sustainable Engineering Design Criteria: • The above plus: • Impact on people (society) • Impact on the planet (environment)
Questions for future engineers to ask about their designs: • Will it be made from recycled materials? • How much energy will it use? • Will it be powered by a battery or solar cells? • Will it be able to be recycled at the end of its useful life? • Will it have parts that contain toxic metals that must be disposed of?
Examples of Sustainability Indicators/Metrics for Engineering Designs What criteria can we use to compare 2 engineering designs to determine which is more sustainable?
Life Cycle Analysis • Process of comparing sustainability indicators for various engineering designs. • Can be done using Sustainable Design Tables (see “Sustainable Design” Module), or software (e.g. www.eiolca.net)